The documentation and provenance tracking of digitization workflows in Cultural Heritage (CH) face persistent challenges due to fragmented metadata practices and the absence of intuitive frameworks. This paper presents a W7-structured metadata framework, implemented through ANAMNESIS, an open-source platform designed to reinforce data provenance in 2D/3D digitization workflows. By systematically capturing the what, who, where, when, why, how, and which dimensions of digitization activities, the W7 model provides a structured, semantic approach to documenting critical technical and contextual details often lost in current practices. The platform operationalizes this framework with customizable schemas tailored to 2D/3D imaging workflows, ensuring traceability, reproducibility, and interoperability. Through real-case applications, the proposed approach not only preserves data provenance but also enables FAIR-by-design practices, empowering CH practitioners to contribute to a standardized, collaborative knowledge base.